EP 0373604 B1 19940309 - Direction tracking antenna system.
Title (en)
Direction tracking antenna system.
Title (de)
Antennensystem mit Richtungsverfolgung.
Title (fr)
Système d'antennes avec poursuite de direction.
Publication
Application
Priority
- JP 307189 A 19890110
- JP 7218789 A 19890324
- JP 31454188 A 19881213
Abstract (en)
[origin: EP0373604A1] A satellite tracking antenna system comprises three or four plane antennas juxtaposed on a single plane. A first and a second antenna are juxtaposed in an azimuth direction, and a phase difference between signals received by these antennas is detected in order to determine a declination of an antenna unit with respect to the satellite as viewed in the azimuth direction. The first and a third antenna are juxtaposed in an elevation direction, and a phase difference between signals received by these antennas is detected to determine a declination of the antenna unit with respect to the satellite as viewed in the elevation direction. The antenna unit is driven so as to reduce these declinations to zero. Stated differently, values of a sine and a cosine function are extracted which have a phase difference between signals received by a pair of antennas as a parameter, and a tangent value representing the ratio therebetween is calculated and is then inversely converted to provide phase difference information.
IPC 1-7
IPC 8 full level
G01S 3/42 (2006.01); G01S 3/46 (2006.01); H01Q 1/32 (2006.01)
CPC (source: EP KR US)
G01S 3/42 (2013.01 - EP US); G01S 3/46 (2013.01 - EP US); H01Q 1/27 (2013.01 - KR); H01Q 1/3275 (2013.01 - EP US)
Citation (examination)
- I.E.E.E. TRANSACTIONS ON BROADCASTING vol.35,no.1,March 1989,pages 56-61,New York,USA; Y.ITO et al.:"A mobile 12 GHZ DBS television receiving system"
- MICROWAVE JOURNAL vol.30,no 7,July 1987,pages 125,125,130,NOrwood,MA,USA;C.M. JACKSON et al.: "Low cost,Ka-Band Microstrip Patch Monopulse Antenna"
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0373604 A1 19900620; EP 0373604 B1 19940309; CA 2005426 A1 19900613; CA 2005426 C 19941011; DE 68913676 D1 19940414; DE 68913676 T2 19940721; ES 2049798 T3 19940501; KR 900011074 A 19900711; US 4994812 A 19910219; US 5073783 A 19911217
DOCDB simple family (application)
EP 89122957 A 19891212; CA 2005426 A 19891213; DE 68913676 T 19891212; ES 89122957 T 19891212; KR 890018459 A 19891213; US 44967189 A 19891212; US 60255890 A 19901024